My twins are nearlly 5yo now so some of these brands/makes I am not familiar with. But I would suggest waiting before buying 2 swings. Some babies don't like them. You might want to just buy one and decide if you need another.
Also, high chairs take up a LOT of room. It might make more sense to get one or 2 boosters that can attach to regular dining room chairs that can convert from high chair to booster seat.
Honestly, I have no experience with the strollers mentioned other than the double snap and go. I LOVED it. Yes, it was hard to steer, but the bottom basket was huge and I could put the BIG boxes of diapers in there and pretty much everything I needed while at Target. So, my suggestion is to either A)get a stroller with a huge basket so you don't have to push a stroller AND a cart with your purchases or B) get a double stroller that pushes one-handed so you can push the stroller with one hand and pull a shopping cart behind you with another. I loved the double SNG because it was so easy and fast to snap baby out of carseat carrier into the stroller. With infant twins, easy and fast are CRITICAL. Plus, the DSNG is cheap!
Oh, my other suggestion is to check weight restrictions on the Arms Reach cosleeper vs. a pnp with bassinet attachment. IIRC, one of them has a weight limit of 15 lbs so it couldn't be used for very long with twin infants.
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